<!--
 * @Descripttion: 文件导出
 * @version: 1.1
 * @Author: sakuya
 * @Date: 2022年5月24日16:20:12
 * @LastEditors: Xujianchen
 * @LastEditTime: 2023-03-19 11:59:39
-->

<template>
	<slot :open="open">
		<el-button type="primary" plain @click="open">导出</el-button>
	</slot>
	<el-drawer v-model="dialog" title="导出" :size="400" direction="rtl" append-to-body destroy-on-close>
		<el-main style="padding: 0 20px 20px 20px">
			<div v-loading="downLoading" element-loading-text="正在处理中...">
				<div
					v-if="downLoading && progress"
					style="
						position: absolute;
						width: 100%;
						height: 100%;
						display: flex;
						justify-content: center;
						align-items: center;
						z-index: 3000;
					"
				>
					<el-progress
						:text-inside="true"
						:stroke-width="20"
						:percentage="downLoadProgress"
						style="width: 100%; margin-bottom: 120px"
					/>
				</div>
				<el-tabs>
					<el-tab-pane label="常规" lazy>
						<el-form label-width="100px" label-position="left" style="margin: 10px 0 20px 0">
							<el-form-item label="文件名">
								<el-input v-model="formData.fileName" placeholder="请输入文件名" />
							</el-form-item>
							<el-form-item label="文件类型">
								<el-select v-model="formData.fileType" placeholder="请选择文件类型">
									<el-option v-for="item in fileTypes" :key="item" :label="'*.' + item" :value="item" />
								</el-select>
							</el-form-item>
							<slot name="form" :formData="formData"></slot>
						</el-form>
						<el-button
							v-if="async"
							type="primary"
							size="large"
							icon="el-icon-plus"
							style="width: 100%"
							:loading="asyncLoading"
							@click="download"
							>发起导出任务</el-button
						>
						<el-button v-else type="primary" size="large" icon="el-icon-download" style="width: 100%" @click="download"
							>下 载</el-button
						>
					</el-tab-pane>
					<el-tab-pane v-if="columnData.length > 0" label="列设置" lazy>
						<columnSet :column="columnData"></columnSet>
					</el-tab-pane>
					<el-tab-pane v-if="data && showData" label="其他参数" lazy>
						<el-descriptions :column="1" border size="small">
							<el-descriptions-item v-for="(val, key) in data" :key="key" :label="key">{{ val }}</el-descriptions-item>
						</el-descriptions>
					</el-tab-pane>
				</el-tabs>
			</div>
		</el-main>
	</el-drawer>
</template>

<script>
import columnSet from './column'

export default {
	components: {
		columnSet
	},
	props: {
		apiObj: { type: Object, default: () => {} },
		fileName: { type: String, default: '' },
		fileTypes: { type: Array, default: () => ['xlsx'] },
		data: { type: Object, default: () => {} },
		showData: { type: Boolean, default: false },
		async: { type: Boolean, default: false },
		column: { type: Array, default: () => [] },
		blob: { type: Boolean, default: false },
		progress: { type: Boolean, default: true }
	},
	data() {
		return {
			dialog: false,
			formData: {
				fileName: this.fileName,
				fileType: this.fileTypes[0]
			},
			columnData: [],
			downLoading: false,
			downLoadProgress: 0,
			asyncLoading: false
		}
	},
	watch: {
		'formData.fileType'(val) {
			if (this.formData.fileName.includes('.')) {
				this.formData.fileName =
					this.formData.fileName.substring(0, this.formData.fileName.lastIndexOf('.')) + '.' + val
			} else {
				this.formData.fileName = this.formData.fileName + '.' + val
			}
		}
	},
	mounted() {},
	methods: {
		open() {
			this.dialog = true
			this.formData = {
				fileName: (this.fileName ? this.fileName : new Date().getTime() + '') + '.' + this.fileTypes[0],
				fileType: this.fileTypes[0]
			}
			this.columnData = JSON.parse(JSON.stringify(this.column))
		},
		close() {
			this.dialog = false
		},
		download() {
			let columnArr = {
				column: this.columnData
					.filter((n) => !n.hide)
					.map((n) => n.prop)
					.join(',')
			}
			let assignData = { ...this.data, ...this.formData, ...columnArr }
			if (this.async) {
				this.asyncDownload(this.apiObj, this.formData.fileName, assignData)
			} else if (this.blob) {
				this.downloadFile(this.apiObj, this.formData.fileName, assignData)
			} else {
				this.linkFile(this.apiObj.url, this.formData.fileName, assignData)
			}
		},
		linkFile(url, fileName, data = {}) {
			let a = document.createElement('a')
			a.style = 'display: none'
			a.target = '_blank'
			//a.download = fileName
			a.href = url + this.toQueryString(data)
			document.body.appendChild(a)
			a.click()
			document.body.removeChild(a)
		},
		downloadFile(apiObj, fileName, data = {}) {
			this.downLoading = true
			var _this = this
			apiObj
				.get(data, {
					responseType: 'blob',
					onDownloadProgress(e) {
						if (e.lengthComputable) {
							_this.downLoadProgress = parseInt((e.loaded / e.total) * 100)
						}
					}
				})
				.then((res) => {
					this.downLoading = false
					this.downLoadProgress = 0
					let url = URL.createObjectURL(res)
					let a = document.createElement('a')
					a.style = 'display: none'
					a.target = '_blank'
					a.download = fileName
					a.href = url
					document.body.appendChild(a)
					a.click()
					document.body.removeChild(a)
					URL.revokeObjectURL(url)
				})
				.catch((err) => {
					this.downLoading = false
					this.downLoadProgress = 0
					this.$notify.error({
						title: '下载文件失败',
						message: err
					})
				})
		},
		asyncDownload(apiObj, fileName, data = {}) {
			this.asyncLoading = true
			apiObj
				.get(data)
				.then((res) => {
					this.asyncLoading = false
					if (res.code === 200) {
						this.dialog = false
						this.$msgbox({
							title: '成功发起任务',
							message: `<div><img style="height:200px" src="@/assets/img/tasks-example.png"/></div><p>已成功发起导出任务，您可以操作其他事务</p><p>稍后可在 <b>任务中心</b> 查看执行结果</p>`,
							type: 'success',
							confirmButtonText: '知道了',
							dangerouslyUseHTMLString: true,
							center: true
						}).catch(() => {})
					} else {
						this.$alert(res.message || '未知错误', '发起任务失败', {
							type: 'error',
							center: true
						}).catch(() => {})
					}
				})
				.catch(() => {
					this.asyncLoading = false
				})
		},
		toQueryString(obj) {
			let arr = []
			for (var k in obj) {
				arr.push(`${k}=${obj[k]}`)
			}
			return (arr.length > 0 ? '?' : '') + arr.join('&')
		}
	}
}
</script>

<style></style>
